Paullinia wurdackii. A Leaf with stem fragment B Inflorescence C Bulbous, axillary bud D Cross section of stem E Pistillate flower, lateral view F Posterior petal with appendage, frontal view G Fruit H Flower with removed perianth showing nectary lobes, staminodes, and gynoecium I Seed, ventral view. A from Croat 58698 (MO) B–F, H from Acevedo-Rodríguez & Cedeño 7654 (US) G, I from Pitman 602 (US).